Simple PHP script to test and use cURL

api.php

<?php

/**
 * Simple request response script
 *
 * Point you cURL request to this script to see all incoming data
 */

echo '*API*'. PHP_EOL;

echo 'Request Time: ' . time() . PHP_EOL;

echo 'Request Method: ' . print_r($_SERVER['REQUEST_METHOD'], true) . PHP_EOL;

if(FALSE === empty($_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'])) {
    echo 'Request Header Method: ' . print_r($_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'], true) . PHP_EOL;
}

echo 'Server Data: ' . print_r($_SERVER, true) . PHP_EOL;

echo 'Request Files: ' . print_r($_FILES, true) . PHP_EOL;

echo 'Request Data: ' . PHP_EOL;
// …Will only work with GET query parameters & POST form parameters
echo 'Request params: ' . print_r($_REQUEST, true) . PHP_EOL;
// …Other methods like DELETE & PUT, and request body content types like JSON
// are not converted into PHP superglobals automatically! Read the input stream instead.
// Note: The input stream may be accessed once only!
parse_str(file_get_contents('php://input'), $_INPUT);
echo 'Input Stream: ' . print_r($_INPUT, true) . PHP_EOL;

curl.php

<?php

/**
 * Simple cURL request script
 *
 * Test if cURL is available, send request, print response
 *
 *   php curl.php
 */

if(!function_exists('curl_init')) {
    die('cURL not available!');
}

$curl = curl_init();
// or use https://httpbin.org/ for testing purposes
curl_setopt($curl, CURLOPT_URL, 'https://my-own-domain.example.com/api.php');
curl_setopt($curl, CURLOPT_FAILONERROR, true);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

//// Require fresh connection
//curl_setopt($curl, CURLOPT_FRESH_CONNECT, true);

//// Send POST request instead of GET and transfer data
//$postData = array(
//    'name' => 'John Doe',
//    'submit' => '1'
//);
//curl_setopt($curl, CURLOPT_POST, true);
//curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($postData));

//// Use a different request method
//curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'DELETE');
//// If the target does not accept custom HTTP methods
//// then use a regular POST request and a custom header variable
//curl_setopt($curl, CURLOPT_HTTPHEADER, array('X-HTTP-Method-Override: PUT'));
//// Note: PHP only converts data of GET queries and POST form requests into
//// convenient superglobals (»$_GET« & »$_POST«) - To read the incoming
//// cURL request data you need to access PHPs input stream instead
//// using »parse_str(file_get_contents('php://input'), $_INPUT);«

//// Send JSON body via POST request
//$postData = array(
//    'name' => 'John Doe',
//    'submit' => '1'
//);
//curl_setopt($curl, CURLOPT_POST, true);
//curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($postData));
//// Set headers to send JSON to target and expect JSON as answer
//curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type:application/json', 'Accept:application/json'));
//// As said above, the target script needs to read `php://input`, not `$_POST`!

//// Timeout in seconds
//curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 0);
//curl_setopt($curl, CURLOPT_TIMEOUT, 10);

//// Dont verify SSL certificate (eg. self-signed cert in testsystem)
//curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
//curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);

$output = curl_exec($curl);
if ($output === FALSE) {
    echo 'An error has occurred: ' . curl_error($curl) . PHP_EOL;
}
else {
    echo $output;
}